HDFS-5100. Merging change r1514574 from branch-2 to branch-2.1-beta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1514575 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5103. Merging change r1514577 from branch-2 to branch-2.1-beta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2.1-beta@1514578 13f79535-47bb-0310-9956-ffa450edef68